4mm OD Niobium Jump Rings

4mm OD (outer diameter) hypoallergenic niobium open jump rings to match our niobium ear wires and heap pins.

Niobium is a non-reactive, single-source metal (not mixed with any other metals). Therefore, it is naturally free of nickel, copper, lead, cadmium, etc..

Electricity is used to create the bronze and antique brass colors. It permanently changes the color of the metal. Therefore, it is not plated and will not chip or fade. Plus, niobium is naturally tarnish-resistant.

These open jump rings are made in the USA with sturdy 20 gauge wire (~0.8mm/0.032").

4mm OD (outer diameter) 

2.5 mm ID (inner diameter)

COLOR DESCRIPTIONS

Bronze - a shiny brown tone with copper undertones.

Antique Brass - brass with a shiny antique finish. Yellow/green undertones.

Dark Gray - shiny, but not as bright as sterling silver (please see photo comparison). It's closer to stainless steel. If you're using other metals, it pairs well with stainless steel, antique silver, gunmetal, black.

We have matching head pins and ear wires too!

Please view all photos before purchasing. If you have any questions, please don't hesitate to reach out.

20 PIECES PER ORDER.

Need larger quantities? Get in touch!